You keep saying this but you aren't making sense. The fact remains that the team in the comic books has always had women and minorities. Diversity has been part of the Avengers since their inception. Adding minority characters who have a long and storied comic book history to the movie franchise is simply a natural progression. Or are you going to argue that the Wasp, the Black Panther, the Scarlet Witch, the Falcon, Photon, Ms./Captain Marvel, etc., are just tokens "shoehorned" in to the comics despite the fact that all of them have been associated with The Avengers for decades?